Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7a66a5c38d63bfa5aa9ebb6d180d79a3d50064055adf54e89a93a2fe015a20a' 
  AND token = '/3Rddt1R1rDtCyiRYgDSyPRRMG+gWILWdlMUwTbLW78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}